2003-10-14_REVISION - M1992069 (3)

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nit p.". box ru CLIENT: City of Greeley OnSU~111NJ T ~'b'eY.coeoa3a PROJECT: North Eogleview DATE: 7/16/03 fK)IflE2PS D (s7a)n3-aoer PROJECT NO.: 02.08 BY: TEB #3 Ditch: Track CL Set CBC FCS Flowline elevation at centerline Bunn channel 4686.33 4686.37 Vpsiream 20' 4686.37 4686.40 Dnstremn 40' 4686.39 4686.30 Ditch bottom higher along north toe by about 0.25', lower along south toe by about 0.25' "gevD#3" S WMM Mode! A. Model existing #3 Ditch without FCS with and without 100 yr storm runoff Begin #196, end #174 with free outfoll at Yn Replace CBC mid upstream and dnstream channel with one channel run 286' long Current ircigation 88 cfs at #196, future 173 cfs To turn on/off storm runoff: Turn on/off Interface files Turn on/off Runoff mode Turn an/off input flows at Section #182 b #188 Link L20 ~ Depth at Depth at Depth at Model results: "gevDlF3.xp" upstrm of HWL "Weir" #176 #170 "Weir" at Inv Elev at Inv Elev at Inv Flow condition cfs "Weir" 4686.41 #176 4685.97 #170 4683.97 Current 88 cfs ircigation, no storm runoff 88 4689.08 2.67 4689.05 3.08 4686.94 2.97 Current 88 cfs irrigation, 100 yr storm runoff 205 4690.32 3.91 4690.29 4.32 4688.17 4.20 Future 173 cfs irrigation, no storm runoff 173 4690.37 3.96 4690.33 4.36 4688.2! 4.24 Future 173 cfs irrigation, 100 yr storm runoff 236 4690.93 4.52 4690.90 4.93 4688.77 4.80 B. Model future #3 Ditch with FCS, curcent 6 future irrigation with mid without 100 yr storm runoff Replace 286' channel with CBC and upstream and dnstream channels Chmrge size of CBC mrd elev of weir for future irrigation plus runoff Current irrigation 88 cfs at #196, future 173 cfs Set CBC elev up 4686.40 Set CBC elev do 4686.30 Length 60 flaw factors Kup 0.5 Kdn 0.3 Ditch channels are "natural" using upstream cross section Vary input flows Vary wetr elev Vary CBC opening gevLBCs.xls Pnge 1 of 6